<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>let 命令</title>
<script>
const student = {
name: '小雅',
age: 19,
// 对象的方法定义箭头函数不适合
showInfo: () => {
setTimeout(() => {
console.log('我叫' + this.name + '我今年' + this.age + '岁');
}, 1000);
 }
 }
 // 1 秒后控制台输出：我叫我今年 undefined 岁
 student.showInfo();
 </script>
 </head>
 <body></body>
 </html>